Flotation-tank for ore-dressing.



I S. K. BEHREND. FLOTATION TANK FOR ORE DRESSING.

APPLICATION FILED MAY 7, 1910.

Patented DecI27, 1910. 7

s. KQBBHREND.

FLOTATION TANK FOE ORE DRESSING.

APPLICATION FILED MAY 7. 1910.

Patented Dec. 27, 1910.

,2 SHEETS-BEBEIQ.

UNITED STATES PATENT oFFrcE.

SAMUEL K. BEHBEND. OF NEW YORK. N. Y.

rLoTATIoN-TAN FOR ORE-DRESSING. I

To all whom it may concern:

Be it known that I, SAMUEL K. BEHREND, a citizen of the United States,residing at New York city, in the county of New York and State of NewYork, have invented cer-- tain new and useful Improvements inFlotation-Tanks for Ore-Dressing, of which the following is aspecification.

My invention relates to an improvement in flotation tanks for oredressing, and the object is to provide means for thinning out rom onecompartment of the tank to another.

My invention further consists-1n certain novel features of constructionand com-binations of parts which will beinore fully describedhereinafter, and pointed out in the claims.

In the accompanyingdrawings, Figure 1 is a longitudinal, verticalsectional view,

Fig. 2 is a top plan view, Fig. 3 is an enlarged sectional view of thefeed hopper, and Fig. 4- is a view in front clevat ion of thevfeedhopper.

The numerals 1, 1, indicate a plurality of tanks or compartmentsarranged adjacentlow the superficial stratum of the watcrj flowingthrough the tanks or compartments sothat the floatin particles on thevater have to travef over these plates in their passage throughthemachine, and preferably from one tank or compartment to another, thusthilnning the water int-o'a thin and creating a'very slight agitation inthe water passing over the plates, thus causing a separation to takeplace from one Serial No. 559,999.

edge of a plate to the other, and the material adhering to andaccumulating on the Specification of Letters Patent. Patented De 27,191() Application filed May 7, 1910.

plates eventually working over and dropping to the bottom of the tank orcompartment. There are as many of these tanks or compartments and platesas'th'e conditions of the ore in separation require, although'by far thelargest portion of the-separation, of course, takes place in the firsttwo or three tanks, the heavier and absorbent particles alwaysdescending to the bottom and finding vent throu h the outlet. pipes to atrough or launder 5, ielow, whereas the flaky floating material at thetop passes through a launder 6,; and thence to a trough 7, whence it istaken care of for any future treatmentre-v quired. v

A feed hopper 15 at the top contains the ore.

This has a sliding gate S.for regu lating the size of opening, and aspreader 9 a at the bottom having a transverse curved rif, fle thereon,which distributes the ore prac tically across the entire area of theflotation tank below; and water is supplied from a tank (notshown),through a pipe lh and discharges through a nozzle 14 at thesurface of the tank. The feed hopper is reciprocated by means of aneccentric on the shaft 18, it being provided with a pulley 17 driven bya belt 16. v Q

More or less slight changes might be resorted to in the form andarrangement of the several parts described, withoutdeparture' from thespirit and scope of my invention, and hence I do not. wish to be limitedto the exact construction herein set forth,

l claim as new and desire to secure-by Letters Patent, is:

1. The combination with a flotation tank adapted to contain water, andmeans for ter and have ore fed upon the surface thereof, of platesextending horizontally over the dividing partitions betweenithe tanks,or compartments. slightly below the superficial stratum'of water overwhich athin film of water and the light floating particles pass,

and upon which the heavier and absorbent particles passing over theplates settle, due to the thinness of the film and the slight agitationcaused in the films during their passage across the plates.

3. The combination with aplurality of flotation tanks, one of whichflows into an other, of horizontally disposed plates located over thepartitions between tanks and approximately coincident with thewaterlevel, the edges of the plates extending well beyond the dividingpartition, whereby the I particles caught on sald plates discharge intothe tanks some distance beyond the dividing 15

